Function find_linklabel

libavfilter/graphparser.c:643–676

}

static unsigned
find_linklabel(AVFilterGraphSegment *seg, const char *label,
               int output, size_t idx_chain, size_t idx_filter,
               AVFilterParams **pp)
{
    for (; idx_chain < seg->nb_chains; idx_chain++) {
        AVFilterChain *ch = seg->chains[idx_chain];

        for (; idx_filter < ch->nb_filters; idx_filter++) {
            AVFilterParams *p = ch->filters[idx_filter];
            AVFilterPadParams **io = output ? p->outputs    : p->inputs;
            unsigned         nb_io = output ? p->nb_outputs : p->nb_inputs;
            AVFilterLink **l;
            unsigned nb_l;

            if (!p->filter)
                continue;

            l    = output ? p->filter->outputs    : p->filter->inputs;
            nb_l = output ? p->filter->nb_outputs : p->filter->nb_inputs;

            for (unsigned i = 0; i < FFMIN(nb_io, nb_l); i++)
                if (!l[i] && io[i]->label && !strcmp(io[i]->label, label)) {
                    *pp = p;
                    return i;
                }
        }

        idx_filter = 0;
    }

    *pp = NULL;
    return 0;
}

static int inout_add(AVFilterInOut **inouts, AVFilterContext *f, unsigned pad_idx,
                     const char *label)